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what would be needed to decrypt a psvimg file?

Open discussions on programming specifically for the PS Vita.
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gregdaleg
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what would be needed to decrypt a psvimg file?

Post by gregdaleg » Tue Jan 29, 2013 9:02 pm

I don't know much about security or programming but I was just wondering what would be needed to decrypt the paving file?
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yifanlu
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Re: what would be needed to decrypt a psvimg file?

Post by yifanlu » Tue Jan 29, 2013 9:09 pm

How do you decrypt anything? You get the key...
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S1NFUL
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Re: what would be needed to decrypt a psvimg file?

Post by S1NFUL » Tue Jan 29, 2013 9:51 pm

And the only way to get the keys within the years to come is for Sony to leak the keys again (like they did with the PS3).
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JVC
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Re: what would be needed to decrypt a psvimg file?

Post by JVC » Tue Jan 29, 2013 10:38 pm

S1NFUL wrote:And the only way to get the keys within the years to come is for Sony to leak the keys again (like they did with the PS3).
Which :roll:
21,EC,nuff said.

gregdaleg
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Re: what would be needed to decrypt a psvimg file?

Post by gregdaleg » Tue Jan 29, 2013 10:43 pm

If the key was obtained how would one use it to decrypt the file?

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JVC
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Re: what would be needed to decrypt a psvimg file?

Post by JVC » Wed Jan 30, 2013 3:09 am

gregdaleg wrote:If the key was obtained how would one use it to decrypt the file?
as said,why decrypt?
21,EC,nuff said.

Jd8531
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Re: what would be needed to decrypt a psvimg file?

Post by Jd8531 » Wed Jan 30, 2013 5:29 am

JVC wrote:
S1NFUL wrote:And the only way to get the keys within the years to come is for Sony to leak the keys again (like they did with the PS3).
Which :roll:
Well preferably lvl_0. Most likely with that we would be able to decrypt the firmwares too.
JVC wrote:
gregdaleg wrote:If the key was obtained how would one use it to decrypt the file?
as said,why decrypt?
This.
Obviously op wants piracy. But the only reason I could see for decrypting would be save data access, but those are contained in their own encrypted savedata.psvimg files (I'm not sure but I think they're diffent from the game files) for certain games. Plus we would have to figure out how to re encrypt it.

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alnitak
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Re: what would be needed to decrypt a psvimg file?

Post by alnitak » Wed Jan 30, 2013 5:57 am

Jd8531 wrote:
JVC wrote:
S1NFUL wrote:And the only way to get the keys within the years to come is for Sony to leak the keys again (like they did with the PS3).
Which :roll:
Well preferably lvl_0. Most likely with that we would be able to decrypt the firmwares too.
JVC wrote:
gregdaleg wrote:If the key was obtained how would one use it to decrypt the file?
as said,why decrypt?
This.
Obviously op wants piracy. But the only reason I could see for decrypting would be save data access, but those are contained in their own encrypted savedata.psvimg files (I'm not sure but I think they're different from the game files) for certain games. Plus we would have to figure out how to re encrypt it.
I don't think it's quite fair to just assume that. I checked this post because I thought it was an interesting question, not because I support piracy. OP could be wondering in a purely academic sense, like I am. Wouldn't you have to know with what algorithm something was encrypted to use the keys? It seems like you could either test it with common algorithms yourself, or find a program that did it for you.

If that's the case, couldn't Sony just make their own encryption algorithm, or are there ways to decrypt an unknown algorithm if you have the key?

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RPT111
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Re: what would be needed to decrypt a psvimg file?

Post by RPT111 » Wed Jan 30, 2013 6:46 am

could use it for fan translation of a game.

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alnitak
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Re: what would be needed to decrypt a psvimg file?

Post by alnitak » Wed Jan 30, 2013 7:16 am

Or to edit save data to cause a buffer overflow to run homebrew.

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